Using Active Directory and Password Change

However, once the password is expired, COGNOS seems not to allow
user to login again, Error likes "User is not authenticated"
comes out, but there is no prompt for user to change the
password. If I explicitly set the password to be expired in
next signon, a prompt for new password can be shown up.

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If I am completly understanding how you are authenticating, I am
assuming you have set the password to expire for your users within the
Directory Users and Computers. If this is true then no it is not a
bug.

Cognos merely provides the API's to connect to the 3rd party
authentication sources. Changing passwords would come under the
mechanisms of how one changes the passwords using the pariticular 3rd
party authenicator you chose. In your case it is AD and therefore it
will be goverened by how windows changes passwords.

Yes, I just use AD just like Dave Vantine mentioned in his reply,
and I have tried to restart the service and it is still not
working.

I know that COGNOS may just use AD as the mean to authenticate
the user only. However, when I set the password to be expired
next signon, I find the COGNOS can provide a way for user to
change his password. So that I think COGNOS may also support to
change the AD password once it is expired. As the PCs of my
company do not join the domain and therefore there is no way for
them to change the password. (Those PCs access the COGNOS thru
web base intranet).

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